Haier N-Series Service Manual page 45

10.3.10 Loss of synchronism detection
Inverter side current detection is abnormal
Outdoor Display LED1 flash 18 times
LED1 flash 19 times
Method of The position of the compressor rotor can not detected normally
Malfunction
Detection
Malfunction when the wiring of compressor is wrong or the connection is poor;
Decision or the compressor is damaged
Conditions
Supposed
Causes
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or parts
Turn on the unit.
Check whether the compressor can start?
Firstly, the compressor start up ,soon the
compressor stopped with the LED1 on the
outdoor PCB blinks 1Hz 19/18 times
Faulty The wiring of compressor
Faulty compressor
Faulty PCB
damage may be occurred.
YES
43
NO
1. The wiring of compressor is incorrect
or the connection is poor;
2. The compressor is damaged
YES
The power module is fault, replace a new
one
Malfunction unsolved
the Malfunctions
compressor is damaged replace a
new one
Domestic air conditioner
Seivice diagnosis
exist also, the